tuttle



Oct. 18,1927. v 1,646,125

H. A. TUTTLE CLUTCH MECHANISM Filed March 15. 1923 3 Sheets-Sheet;

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Oct. 18, 1927- H, A. TUTTLE CLUTCH MECHANISM Filed March 15. 1925 H. A.TUTTLE CLUTCH MECHANISM Filed Oct. 18 1927.

3 Sheets-Sheet 3 Ik vez? oi.

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Patented ct, 18, 199.7.

.Application .filed lli, 19223. Eierial No.

This invention relates to clutch mechanism i especially adapted for usein connection 'with reversing gearing of the type in which two shafts,as a driving shaft and a driven shaft, are adapted to he Vconnected bymeans, as gearing, for reverse drive, and adapted to be connected bymeans, a.

y clutch mechanism,` for forward drive, and is intendedas an improvementto my Patent No. 1,392,984, dated Gctober 1l, 1921.

The reversing; gearing herein illustrated comprises Iogears secured,` tothe proximate ends of the drivingr and driven shafts, and in meshwithpinions supported by a carrier in the form of a casing, which mayenclose them, and a `bralreeinechanism is associated therewith Atosecure reverse drive, adapted to restrain the casingr against rotationwhereby the drivingF shaft willfoperate through the gear securedthereon, to rotate the pin ions thus maintained against rotation aboutsaid shaft, to ireversely rotate the driven shaft.

The clutch-mechanism employed to secure forward drive may comprise a?clutch member secured to one of said shafts, as the driven shaft,against relative rotation with respect thereto; and adapted to engage aclutch member secured to the casing; against relative rotation withrespect thereto, and the engagement of said two clutch members serves tolock said casinal to the shaft against independent relative rotationwith respect thereto and thereby serves to lock both shafts through thepinions carried by the casing, for simultaneous forward rotation. Saidclutch-mechanism may also comprise a plurality of clutch` plates,certain of which are secured in slidablabut against rotative, engagementwith said easing, and others of which are secured in .slidable butvagainst rotative engagement with a clutch plate carrior adapted to beconnected for rotation with one of said shafts1 as the driven shaft,

and a movement of the clutch plate carrier toward the casing causestheengagement of the ciutch platesand thereby locks the casing and shaftagainst relative rotation.

rThe clutch-mechanism includes operating" mechanism which may compriselink and lever mechanism and means arranged to connect the clutchplatecarrier positively to the driven shaft and apply pressure to the twosets of clutch plates, to effect the en gageme'nt of the cinteh forforward rotation of the iiw'ven .shaft and release the y he compresclutchinn` pressure and disconnect the clutch plate carrier from the'driven shaft for neutral and reverse rotation of the driven shaft, andin the disconnected condition of the clutch plate carrier, it is freefrom direct ,driving` connection with any rotating part of thereversing` gearing.

ln my above mentioned patent, the driven shaft has an externallyscrew-threaded por tion, and the pmesure-adjusting ring of the linlr andlever mechanism of the clutch operating` mechanism is mounted thereonand is adjustable along` the length of the shaft for proper clutching;pressure and to compensate for wear in the clutch plates; and theclutching' pressure is exerted against and resisted by a wall of thecasing; and the clutching aetion tends to move the casing axially.

Anobject of this invention is to provide means by which the clutchingpressure is balanced whereby to `obviate the tendency toward arialmovement of a gearing element, and for this purpose the driving anddriven clutch plates may be disposed and adapted to `d into clutching,rrelation by means carried by the same rotatable element of the nearing,i means may include a member lined to the driven shaft against rotationand also against axial movement thereon, and adapted to receive andsupport the clutch plates against arial movement due to the pressureeffetting` the clutching' engagement of said plates. Said means may alsoinclude the clutch plate carrier and operating mechanism also connectedwith said fixed'member and adapted to exert a thrust against it in adirection opposite to thatof the clutch engaging pressure, whereby bothpressures are balanced and said fixed member, and the driven shaftconnected therewith,` are without aXi al movement during' clutchactuation.

In my aboveanentioned patentn the clutch operating; .mechanismii'icludes a jaw clutchmeniber adapted to connect the clutch platecarrier positively with the driven shaft, and said jaw clutch-inember ismounted on the driven shaft for conjoint rotation therewith and forarial movement thereon.

lt is an object of this iiivention to mount said j aw clntch-memberuslidably onthe pres- ,sure member above mentioned and fix it forconjoint rotation therewith A further object to provide novel meanscomprising internieshing external er s ur teeth carried by theprese-rufe meiner as the driven shaft; and said and `internal .gearteeth carried by the jaw clutch-member for connecting said pressure andclutch members; and said means admits of the javv clutch member slidingeasily on the pressure member and provides rela-tively great strength totransmit the driving torque between the driving and driven shaftsthrough the clutch plates.

further object is to provide improved means to lock the clutclvpressureadjusting ring positively in adjusted position vand to the pressuremember.

A lurther object is generally to improve Vthe construction and operationot clutch mechanisms.

Fig. l is an elevation, `partly in section, ot' a reversing gearingembodying` my invention, with 'the clutch mechanism set 4tor tor- Wnrddrive.

' Fig. .2 is a View similar to FG'. l but with the Aclutch-mechanismdisengaged `and the vset for reverse drive.

Fig. 3 is an .elevation of the pressure member.

',llig. l is a section along line el---fl `ol Fi l.

Fing. 5 is an enlarged detail of the inte:- iai-eshing spur andinternal. gear teeth ot the 1 pressure member and jaw clutch-member.

Fig. `6 is an end detail oit the locking means "iter the clutch-pressure4adjusting ring.

Figi? is 'a 'sectional view along line A7-7 Oflig. 6.

Fig. 8 is va sectional detail along 'olf Fig. Il.

Fig. 9 is sectional detail along line El of Figi.

As here 'shown9 the reversing gearing coinprises the driving shaft l0and the driven shaft ll, the proxiniiatc ends of which may terminate.Within the gearing casingand have secured thereto, by keys l2, the spurgears l?)V and 14. iii ball bearing l5 is or may be disposed in the endof the bore ot sai-d gear le, and the driving shaft l0 formed with a.reducedV endpotion 16 which lits Within said bearing, whereby the twoshafts line 8-.8

I are-held in arri-al alignment.

The reversing gearing includes the cylindrically-slieped7 or drum,member 1T which has a radially 'inwardly extended vvall 1 8 intermediateits length, and Wall is formed vvith a concentric hub 19 vfhich isinternally recessed and a ball bearing E2() is received in saidrecesswvhich terr-v; a bearingfor the gearing casing on the c. 7en shaftll. The gearingcasing is also provided With a cover plate 2l which ormay be secured to `the end ot the casing by the bolts 22 and forms anend Wall o'l the casing. Said plate 2l is concentrically recessed and aball bearing 23 received i said recess and forms a bearing support torthe casing on the driving shaft l0.

The spur gears 13 and let Which are secured respectively to the drivingand driven 1,646 les rear le secured to the driven sha tt ll is hereshown as the larger of the two guai-.ii and is in mesh with setsl ofpinions E253. which are revolubly mounted on pins 2li, secured in theWalls '18 and 2l ot the `gearing casiutl; :and said piniors are uzadolong` enough to mesh with laitpinions not showin vvhich are similarlycarried by Athe gearing casing; and said latter pinions are in ino-hwith the spnrygear 13 secured to the dri. i' shalt 10.

`Said `arrangement provides ghuictary gearing elements connectedrespectively vvilh the drivingv and driven shafts by which ro versedrive is secured l'or. when the gearing casing, and consequently thepinions are restrained from revolviinr, said driving slia'lil l0transmits a rotary moveuient through tlu` spur gear lll und meshingpinion#` lo the spur gear lll ot the driven shaft and rotates said shaltin a direction reversed trom the direction ofi rotation of the thrivinglshalt.

`Wh1ile the 'Form oit gearing herein described is desirable, especiallyfor transinitline` lar-gre powers and high speed on reverse drivd yuother reverse drive mechanisms univ he employed.

The clutcli-ineclianisin which nssociutml vvith the rtnfcrse-drivemechanism. hy menusl 'of which the driving sha'l't l() and driven shaftll may `be connected for torivard drive. is disposed vvithin :theextension il() ot the cylindrical all l? olf the tfafs'iiis` and beyondthe radial Wall lll oi the casilur.

Said clutclmneclmnisnt iut-.ludos4 lwo seis ot clutch plates .and carvvinf1v elements there for,` at least yone o'l which is rnovalfiloaxially to cause the engagement ogt said pls'flvs 'l'or actuation andengagijcniunl o the clutch. The clutch plates` of one set. as lil. havetheir outer edges ot spur grardooth Forumw tion, B3. adnptintrI thorn loenter the intordental spaces and slirlnbly in infernal teeth termed onthe inurual hier ol the wall 30 of the gearing cfuiinggj. vrhlch servesmeins tor connecting the olal'oi;

"Jn to the casing against iinleiiendont rotation and also provides meanswhereby raid plates may be moved axially with respect to the casing. inan actuation o'l the clutch info engaged or disengaged condition.

The clutch plates ol" the other wel., au l). have their innerpori'gihevics ol internal fzlrar tooth torinatioin as 3G. adaidingr theml'or relative sliding engagement with spur pear teeth 37 on a hub 38which is ordrnfled troni an annular disc 39 and vvhir'h serves a1: thecarrying element lor said sut ol" plates. Said teeth 37 form nieansconnecting yl plates 36 to the carrying element against independentJrotation With respect thereto tl (l and at the same time provide meanswhereby said plates may be moved axially in an actual tion of theclutch.

ln accordance with this invention, l. pro vide a hub4l0 which is fixedto the driven shaft ll against both axial movement therealong andindependent rotation thereon by suitable means as the key 4l. formed orprovided with an enlarged hub portion 42 at its inner end adapted tosupport the hub 38 of the carrier element for the clutch plates 'Anannular flange 43 extends outwardly from the inner end ot said enlargedhub 4t2 and serves a pressure member adapted to support the sets otclutch plates against the pressure caused by the axial movement ot' thecarrier element `in actuatingl the clutch.

The outer tace of the flange 39 of the `carrier element is formed orprovided with a plurality ot teeth 45, Fin. formed with tapered sidewalls, and a thrust ring Lt6 of the clutch operating mechanism is formedwith corresponding teeth i7 adapted t0 enter the interdental spaces oilsaid flange 39 and engage said teeth 45 to move the carrier elementaxially and effect the actuation ot' the clutch. Then the thrust ring iswithdrawn to a position clear of the teeth l5 of the carrier element,`Fig. 2, the clutch is disengaged and the carrier element and the set ofclutch plates carried thereby is 'tree from positive driving engagementwith a rotatable part of the reversing gearing. With this arrangement,both sets of clutch plates may be without relative rotation in theneutral orreverse drive conditions of the gearing. The ceac-ting teethon the carrier element and thrust ring form elements of a 'jaw-clutch bywhich the carrier element is connected positively with or disconnectedfrom d 1iving engagement with the driven shaft.

The axial movementof the carrier element outwardly, or towardclutch-disengaged position,` is restricted by the stopmembers 30 securedto the wall 30 by the bolts 5l and which project inwardly into the pathof axial movement ot said carrier element.`

ln accordance with this invention, the thrust ring 46 is mounted toraxial movement and against independent rotation on` the hub 40; and forthis purpose1 said thrust ring is termed with the internal gear teeth 55which mesh with the spur gea-r teeth 56 formed upon said hub 40. Saidintermeshing teeth 55 and 5G form .means `For connecting said thrustring 46 to the hub 40 against independent rotation with respect theretoto transmit the driving torque trom the driving shaft. and at the sametime provide means 'whereby the thrustring 4:6 may be moved axially onthe hub 40 to `actuate the clutch.

Said hub is The pitch dianieterof the internal gear teeth adapted to beslightly greater than the pitch diameter of the spurgear teeth wherebysuitable clearance between the teeth is provided to permit a relativesliding movement therebetweenn By reason oi the gear tooth -lorimitionof the connection between the thrust ring and hub, a strong drivingconnection therebe tween is provided and yet the thrust ring may beeasily moved axially on the hub; and the gear tooth connection may becheaply and accurately constructed.

The operating mechanism tor the clutch mechanism includes the sleeve 60which is slidably mounted and rotatably free on the driven shaft l1.Said sleeve 60 is formed or is provided with an outstanding flange 6lwhich is provided with the ears 62. Links 62% have similar ends thereofdisposed between said ears and pivoted to pins Gel lixed in said Theother ends oli said links are pivoted, by pins 65, to the arms (56 ofbell-crank levers, and said belleranlr levers are pivotally connected bypins 67 to the thrust ringlG. The other arms G8 ot said bell-cranklevers are pivotally connected by pins 69 to pairs ot links 70, and saidlinks 70 are pivoted on pins 7l carried by the ring 72. vSaid ring 72Yis adapted to be secured in `fixed position on the hub 40 secured tothe driven shaft 11. by means hereinafter to be described. Said arms GSot the bell-crank levers and said pairs of links 70 constitute togglemembers and whensaid sleeve 60 is moved axially on the driven shalt l1toward the right, Fig. L said toggles are straightened and operrate toforce the thrust ring 16 into driving engagement `with the carrierelement `and move the carrier element axially on the enlarged hubportion l2 of the hub 40 to actnate the clutch A movement ol the sleeveGO in the reverse direction serves to break the toggles and effect thedisengagement of the clutch and also the disengagev ment o't the thrustring i6 `from the carrier element.

Said thrust ring 46 is formed with an outstanding annular i'lange 75, orequivalent adapted to be engaged by the arms G8 ol' the bell-cranklevers to hold thetoggle members in a slightly over-shot. positionwhereby to hold the clutch in engagement against Athe clutching pressureand driving torque transmitted to the thrust ring through the teeth l5of the carrier element and teeth 47 of the thrust ring.

Said ring 72, with which the links 70 ot' the operating mechanism areconnected, in accordance with this invention is connected with the hub40 against independent rotation with respect thereto and for axialmovement thereon in a manner similar to the connection of the thrustring 46 with s'zi'yfid hub. Said ring 752 is lformed vvitl'i theinternal rgeur teeth 8O which mesh With the spur rgeni' teeth 56oif'seid hub el() und itorin connectingrn'eins by 'which said' ring 72is .positively restrained "troni independent rotution but is free forasiel movement thereon.

Meninsare provided to adjust the 'link und lever operating mechanism toexert u `suitabley clutching pressure upon the clutch mechanism, andto'ftzike up weer in the ich-itch components due to extensive use. Seidineens includes in adjust-ing nut in the `form of a ring Suid ring` isinternally scTeW-threided and, in''ccordunce With this invention, thehub 40 'has the reduced end- Vportion 86 vvhich is externallyscrew-threadedgjnd said 'ring 85 is threaded thereon. Said indy be'formed with u pluinlit7 'of 41feeesses A87 in its Aperiphery adapted toretc'e'ive e. Spanner Wrench or othe" suitable tool 'to rotate thering,` ont'he hub. lt is obviousl 'tflrat es said 'ring is advunc'edonseid hub eli), the clutch operating ineclmnisni'will exert een increasedpressure on the clutch in actuating' it; `and seid ring torins onabutment 'Carried by the hub f1() udup ted to receive the vthrustpressure of the operating mechanism.

Novel ineens are herein employed to lor-,lr the adjusting ring` to thehub L10 in adjusted position. For this purpose a. clamping' rin` 90 isdisposed against the outer face oi' the dju'sting ring and muy have anunniilnr recess in which the adjusting ring;` is rotatably received; andseid ring 72, Which also serves as u clamping ring', may have u similarrerings are somewhat looselyrheld iigninst the 'adjusting ring 85, sothat said adjusting.: ring "can be rotated to chen the zuijustmentthereof. A clniping bolt is passed through the remainingv set ot lugsund muy be threaded in one oit seid lugi liilli'en said ,boltistightened it serves to d evv seid rings 72 and 90` iirinly ugenst theedjusting ring; 85 to "clamp said ring 5255 therebetnueen,` mid rings`72 and 90 pivoting about the rivets vvand 93 for this purpose? sind.:is seid ring; restrained from rot-ation on thehub 4 0.

seid urrangenient serves to loch the udiust ring against rotation. Achange ot ud justment may be made by loosening` 'the clnnpii'ig bolt 95,which Will release. the udjust-ing ring for rotation on the hub LlO.

Suid sleeve G() is inovednxiully on the driven shaft 11 by the forkedurni 100 `which engages a pin 101 'carried by the collar 102 which isrotatably carried on said sleeve. Seid 'arm is tctuated by suitablemechanism 10?, inclluling the opernti'ng bundle T04. und smid nieclmnism:deo is urrunger to Qontrol :1. brake bund 105 disijiosed about thecui-ung); l' to'engug'e und hold said Casing: uguinst roto-- tion tosecure revee drive. lrloveinent o l" the handle in one rdirection :tromneutral. etiiects engagement ot the clutti'i to secure ior- Wind driveund n'iovenient in the other direction from neutral cilectf-i(infringement oi. the brfilie bund with the cusinerl? to secure reversedrive. Suid inet-hunnen is no port of the present invention und need nothe described 'turtheix l cluiin:

1. The coinbinfxtion olf u driving shutt, u driven shiitt7 n casingussociutcd with Huid driving shn'lit, und clutch mechanism adapted toconnect seid shu'lts for liorivurd drive including` clutch plfitescarried bv seid cusv ing, fin axially movable carrier element, otherclutfch pistes carried by Suid carrier element, u member Vlined to saiddriven shaft uguinst axial infiveincnt thereon d posed to support seidhitch pluies :u juinst :iXiul movement, und operzitinp` mecluinisincurried by Suid lined inefinbiiir mfrungred to more seid urrier clementuxiully und nctuute the clutch.

2. The combination of :i driving* shzitt, u driven shnrtt. u, casingvussocirrted vvilh shid driving shrill'.1 und clutch inechunism adaptedto connect sind shutts tor :forward drive including clutch platescurried by seiid rusl e normally freely rotatable und n.ii'iollyniovu'ble ceri-ier element, other clutch pluies carried b v said carrierelement, :i member iizled to suid driven shuit against unimi movementthereon disposed to support said clutch pluies u iinst :miel uwvement,:md oporuting .mechanism (-:irried hiv said lined meint-wr errunged toconnect suid rurrirl; element ngninst iiulepcndent rotation with respectlo said fixed member und move suidrurrier oli ment ziviulljv to urtuulethe clutch.

Il. The mmbinzition ot :i driviiuiv simil. :i driven shuit, u casing;ussoriuted with .suid 'driving slur it, und clutch ineihilnism uduptedto connect silid shults For l'orvrn rd drive in- Finding;` clutclipluies irz'irriid hir snid mining, en uni i iriin'iible Currier element.other clutch pl es carried by id ciirrirr element, u. member fixed to s:id driven shfi'tt nrrmihed to support seid verrier element 'for ovini,movement thereon und seid riutrh pluies against n'vinl movement undruiierutiur meehunisni carried hi' said lifted meuilwr :irruinge'd toinove unid Currier elrnmm miiullv on said lined member lo urinate theclutch. 41;, The coinbinntibn ot n. dri ving shrill. u driven shuiiinu.basing :issociuted with siiid driving ehufie und clutch meelun'iism:u'hipted to connect snid shiitts ior torwurrl drive includingclutrhplates curried h v ssiid eus-- ing, un uiiiullfv inovuble Currierelement`v other clutch plates eurried by wild eerder en l im drivenshaft, and clutch mechanism adapted ment, a member fixed to said drivenshaft arranged to support said clutch plates against axial movement,said carrier element .supported on said fixed member for normalsaidcarrier element axially to actuate the clutch.

5. The combination of a driving shaft, a driven shaft, a casingassociated with said driving shaft, and clutch mechanism adapted toconnect said shafts for forward drive including clutch plates carried bysaid caselement, a member fixed to said drivenshaft` arranged to supportsaid carrier element for axial movement thereon and said clutch platesagainst axial movement and extended outwardly beyond said carrierelement, and operating mechanism `carried by said fixed member beyondsaid carrier element arranged to move said carrier element axially-toactuate the clutch.

G. The combination of a driving shaft, a

to connect said shafts including clutch plates associated with thedriving shaft, other clutch plates associated with the driven shaft, anaxially movable carrier element carrying said latter clutch plates, amember fixed to said driven shaft having a hub extended loosely throughand outwardly beyond said carrier element and an annular Harige arrangedto support said clutch plates against axial movement, clutchoperatingmechanism including a thrust member slid-- able axially andfixed against rotation on said hub arranged to move said carrier elementaxiallyto actuate the clutch and pres- Y sure means connecting saidthrust member and hub to move said thrust member axially.

7. The combination of a driving shaft, a driven shaft, and clutchmechanism adapted to connect said shafts including clutch platesassociated vvith the driving shaft, other clutch plates associated vviththe driven shaft, an axially movable carrier element carrying saidlatter clutch plates, a member.

fixed to said driven shaft having a hub` "tended outwardly beyond saidcarrier element and an annular flange arranged to support said clutch`plates against axial movement, clutch operating mechanism including athrust member axially movable and fixed against rotation on said hubarranged to move said carrier element axially to actuate Athe clutch,pressure means connecting said 8. The combination of a driving shaft, a

`driven shaft, and clutch mechanism adapted to connect said shaftsincluding clutch plates associated with the driving shaft, other clutchplates associated With the driven shaft, an axially movable carrierelement nism including a thrust ring arranged to4 move said carrierelement axially and actuate the clutch, said thrust ring having aninternal gear tooth formation meshing With the external gear teeth ofsaid hub by which it is connected for axial movement on said hub butagainst independent rotation With respect thereto, and pressure meansconnecting said hub and thrust ring to move said thrust ring axially.

9. The combination of driving and driven shafts, chitch-niechanismadapted to connect said shafts'and clutch operating mechanism includingan axially movable thrust ring having `an internal gear tooth formation,said driven shaft having means providing an external gear toothformation meshing with the internal gear tooth formation of said thrustring by which said ring is free for axial movement on said shaft andconnected against? independent rotation With respect thereto, a ringhaving an internal gear tooth formation arranged to mesh with theexternal gear teeth of said shaft by which said ring is free for axialmovement on said shaft and is connected against independent rotationwith respect thereto,

means to hold said ring against axial moveu ment, and pressure meansacting on said ro- Y `tatably fixed and thrust rings arranged to movesaid thrust ring axially and actuate the clutch.

llU

l0 The combination of driving and driving an internal gear toothformation mesh-- ing with said external gear teeth by which said ring isaxially movable 011 said member and connected against independentrotation with respect thereto, a ring having an internal gear tooth`formation arranged to mesh with the external gear teeth of said memberby which said ringis free for axial movement on said member and isconnected against independent rotation with respect thereto, means tohold said ring against ax-.

iai movement, and pressure means acting on said fixed and thrust ringsarranged to move said thrust ring axially and act-nate the clutchu llilli

' rings'into"holding" engagement with 11i The combinationoi driving anddriven shafts, Clutch mechanism adapted to conneet saldi shafts, andclutch operating meehanisnrinel-uding la hub fizied to the drivenshatthavl'ng an external gear tooth torinaing!y mit-threaded, onthethreaded portion ot said hnb,"mea n s` to` loelr saidfnut tosaid hubine'ltidingafclam'ping ring n mit.'and-"'having'an internal, gear toothtor^ mationmeshing with the external gear teeth oit-said hub, andpressure means acting on saidvnutalndthrust` ring arranged to move said'thrust ring axially to actnate the clutch.

l2; The combination ot' driving and drivenshatts,"elutchmechanismadapted to con nect said shatts and clutch operatingmeehan'is'milnclndinga thrust sleeve axialljy7 movable?'onsaidE drivenVsha'tt to" act-nate the clntchyan. 'adjusting nut adjustablv rotatably"arri'e'dun said'slialft,` means Yto lock said nut adjusted` positionagainst rotation with 'respeotto'saidg' shal't including tivo clamping?rings disposed on opposite sides ot saidfjnut, means Connecting` one ot'said ringsV vvith said-shaft against rotation respect thereto, andlmeans to draw said nutfan'd! pressure' means' actingu on said thr st'ringandhoneot said clamping rings arranged-.to move said thrust ringaxially anldfaetuate the' cl'uteh.

13. The combination ot driven shafts, Clutch meehanism adapted toconnect 'saidshafts, and 'clutch operating meel'ianisinincluding a' thi1st sleeve axially' movable on said` driven shaft to aetiiate the clutch,an adjustable nntadjustably rotatablyl carried on said shaft, means tolocl sai'df rmty 'in `adjustedposition Vagainst rot-ation with respectto`said"'slit/ift including two clamping rings disposed on opposite sidesofsali'cl nut,` means 'conneetine` one ot said rings with said shafttagainstrotation with respect thereto,` and means to` draiv saidi ringsl'into holding` engagement With saidl nut-,f comprisinga pins looselyAConnecting` said i clainpingrings anda Clamping bolt extendedbe'tivefen' 'saidfrings, and pressureaneans connefetingf'saidltlnfustring and said rotatably Xed Clamping ring'`r arranged to nieve' saidth'rust ring'ailiallyto aetuate the clutch.` ltlhe combination otdriving and driven shafts,"cltitch lnieehanism adapted to connec't'saidshafts, andl clutch operating enoaeing saidA withy saidy driving Vandineaeiae mechanism including a huh tired to said driven shaft listing` anexternal gear tooth formation andan enteriorlyT serew-thrcaded portionbeyond said gear teeth, a thrust ring having an internal gear tooth:formation meshingl with said external gear teeth on saidihnb by whichit 'treeY l'or axial move ment on said hub and comiected against rotation with respect thereto, an adjustingl nut threaded-on saidsereiv-threaded portion oit said hub, clamping` rings disposed onopposite sides oit-said nut, one ot? said clampint rings having aninternal gear tooth torina# tionmeshing` with said external gear teethon said hub h v which it is tree vl'or aerial` movement thereon andlined against rota tion With respeet thereto, means to draw saidclamping" rings against said nut in cltiding pins loosely,vconnectingsairhriings and a clamping bolt connecting said rings, andpressure mechanism connecting said fixed 'ela-niping` ring and saidthrust ring` arranged to move saidy thrust ring axiallj,7 to actuate theclutch.

15. rllhe combination ot dri ving,` and dri veny shafts, an enclosingcasing associated with .said drivingshaft, and clutch mechanism adaptedto connect said shafts iiicludingaii axially movable carrier elementdisposant` within saidcasing, and-a plurality ot separate means carriedby said casing extend eel-inwardly and arranged to limit the axial.movement of said Carrier element.

16. rihe combinationotdrivino and driven shafts, an enclosing* casing;lassociated with iid driving shaft, clutch meehanism adapted to connectsaidy shatts, aid clutch mecha nism including clutch plates carried b vsaid` casing, other Clutch plat-es, ananially` movable carrier elementforming an end vraill of saideasing arranged to support said latterClutch plates, and operating mechanism ar ranged to more saidcarrierelement axially toY actuate the clutch.

1T. The Combination ol driving and driven shafts, an enclosingy casingassociated with said driving shaft, clutch mechanism adapted to connectsaid shafts, said `clutch meehanism including` clutch plates carried bysaid easing, other elutolr plates, an axiallyV movablecarrier elementiterminer atrend wall of said easingl arranged to supportsaid llatterclnteh plates', a pluralit)7 of separate mean:

`oairieiil by said casing` extended inwardly HENRY it. 'DUTTLE "Nilllltll

